The GACX 44307 Walthers 39's Single-Bay Airslide Covered Hopper is a highly detailed model replica of an Airslide Covered Hopper in gray color. This unassembled kit is made of plastic and is 7.5 inches long with a height of 2 inches. It is designed for a Two-Rail System and is powered by DC, featuring an analog control system. This brand new model from 2009 is a perfect addition to any model railroad collection, with its realistic design and representation of the General American Leasing corporate roadname.